Aralova T. Estimation and creation of initial material on signs of the increased seed productivity for selection of Common vetch (Vicia sativa L.) in the conditions of the right-bank Forest-steppe zone of Ukraine.

In the dissertation work the results of researches on studying of 30 collection samples of Common vetch on indicators of morphobiological signs and elements of structure of seed productivity are stated. Samples with increased seed productivity and high ecological parameters of adaptability were selected: Margarita, Bilotserkivska 7, Pributhka 19, Svitlana, Liliana and Vladislava. As a result of hybridological analysis of hybrids (F1) of Common vetch, depending on the combinations of crossing, different nature of inheritance was revealed – from positive overdominance to depression. Different levels of frequency and degree of manifestation of positive transgressions in hybrids (F2) of Common vetch on the main economic and valuable traits were established. On the basis of the hybridological analysis carried out according to the full dialial scheme of crosses of five collection samples, the peculiarities of the manifestation of the effects of general (GCA) and constants of specific (SCA) combination ability on economically valuable quantitative features are determined. Genetic parameters and coefficients of heredity in the broad and narrow sense of traits of seed productivity are established. The valuable lines of Common vetch were created as a promising source material with a high level of seed and fodder productivity: K - 9/10, K - 11/10, K - 12/10, K - 13/10, K - 15/10 and K - 18/10. In 2018, the most productive selection number К -16/10 under the name Winner was transferred for qualification examination in the system of the State variety testing of Ukraine. Key words: Common vetch, variety, hybrid, trait, line, adaptability, plasticity, stability, diallel crosses, transgression, inheritance, heritability, combination ability.